Ahmed Mohamed Ahmed Mahmoud

8 Questions 13 Answers 0 Followers

Questions related from Ahmed Mohamed Ahmed Mahmoud

Dear All, What is the best calculation method to understand the interaction between molecule and Pt catalyst surfaceuUsing Spartan 16 software?

I need to compare between new and traditional structures for their catalytic activity with Pt-Catalyst to be used as ionomer in the catalyst coated membranes in Fuel cell applications. Anyone can...

10 October 2018 2,321 1 View

How to normalize the FT-IR spectra of the same thin film polymer membranes to increase the intensity of the small peaks????

07 July 2016 456 2 View

Can you give me an explanation, if a crosslinking happened or not?

I'm preparing polyflourinated polyether-polyphenylene block copolymer using Ulmann Reaction (Ni(cod)2). and I prepared it many times befor and it was Ok. but this time New peaks appeared in 19FNMR...

02 February 2015 5,492 8 View

Does anyone have an idea about the best method to prepare Vilsmeier salts of ureas?

I tried different methods but either low yield or no product obtaied?

01 January 2015 5,920 4 View

How can I prepare a membrane of solid polymer for fuel cell applications?

I want to prepare a membrane from solid aromatic block co-polymer for fuel cell applications. How do I do it?

09 September 2014 7,593 3 View

What is the stability of benzyl azide as a side chain in sulfonated polyether sulfones under Nucleophilic polymerization conditions?

I want to prepare sulfonated poly ether sulfone from (diol contain benzyl azide in the ring) and diflouro derivatives. I want to know if the benzyl azide will still stable under nucleophilic...

09 September 2014 1,443 4 View

Can anyone help me find the best methodology to prepare polymer electrolyte for membranes?

I want to prepare polymers with sulfones or quaternary ammonium salts to used as membranes, I need some ideas for the best methodology in this way.

12 December 2013 5,291 1 View

How can the reaction of cyanoguanidine and ethylenediamine proceed?

Does anyone have an idea about that reaction? I want a nucleophilic attack of ethylenediamine on cyano group in cyanoguanidine. May it proceed in diluted HCl?

11 November 2013 6,887 3 View